212 ANALYSIS OF THE NATURAL OKDERS. 



4 Leaves opposite . (s) 

 4 Leaves alternate.. (5) 



5 Stamens on the torus or the hypogynous corolla. .(0 

 5 Stamens and petals on the calyx tube. . (v) 



6 Ovaries simple, distinct, or one only. Vines or erect shrubs, .(w) 

 6 Ovary compound, and wholly adherent to the calyx (x) 

 6 Ovary compound aud free from the calyx or nearly so. . (7) 



7 Stamens opposite to the petals and of the same number, .(y) 

 7 Stamens alternate with the petals or of a different number. .(8) 

 8 Leaves opposite on the stems.. (z) 

 8 Leaves alternate, and compound.. (yy) 

 8 Leaves alternate and simple.. (zz) 



9 Polyandrous stamens 310 tunes as many as the petals, .(m) 

 9 Oligandrous, stamens 12 times as many as the petals or fewer. . (10) 

 10 Pistils separate and distinct, few or solitary, simple, .(n) 

 10 Pistils united into a compound ovary free from the calyx. .(11) 

 10 Pistils united into a compound ovary adherent to the calyx, .(o) 

 11 Stamens opposite to the petals and of the same number. . (p) 

 11 Stamens alternate with the petals or of a greater number, .(q) 

 12 Flowers regular or nearly so. Fruit never a legume . . (14) 

 12 Flowers irregular (rarely regular and the fruit a legume). . (13) 

 13 Stamens numerous, 3 or more times as many as the petals. . (k) 

 13 Stamens few and definite, 4 12. .(I) 



14 Stamens (or anthers) 310 times as many as the petals . . (15) 

 14 Stamens few and definite. Ovary free from the calyx. .(17) 

 14 Stamens few and definite. Ovary adherent to the calyx. . (J) 

 15 Stamens hypogynous inserted on the torus. .(16) 

 15 Stamens perigynous inserted on the corolla at the base, .(c) 

 15 Stamens perigynous inserted on the calyx at the base . . (d) 

 16 Pistils few or many, distinct (at least as to the styles), .(a) 

 16 Pistils (and styles if any) completely united. . (b) 

 17 Pistils one, or indefinite and distinct, simple . . (e) 

 17 Pistils definitely* 2 united, the short styles combined into one..(f) 

 * 2, 8 or 4 united, styles or stigmas, 2, 3, 4 or 6. . (g) 

 * 5, distinct or united, with 5 distinct styles. .(A) 

 * 5, united and the styles also combined into one. . (i) 



a Petals 5 or more, deciduous. Leaves never peltate KANUNCULACE^E. 



a Petals 3 or numerous. Water plants with peltate leaves \ 



o Sepals 46, equal. Petals OO, imbricated in the bud.. . . f 



b Sepals 5, equal. Petals 5, imbricate. Leaves tubular SABBACENIACE.E. 8 



b Sepals 5, unequal. Petals 5, convolute. Flowers of 2 sorts CISTACE^E. 15 



b Sepals 2, with bb 5 petals imbricated in the bud POBTULACCACE.E. 20 



bb 4 or 8 petals usually crumpled in bud PAPAVEBACE.E. 9 



c Filaments united into a tube. Anthers 1-celled MALVACEAE. 23 



d Sepals 2, persistent, capping the lid of the pyxis POBTULACCACE^E. 20 



d Sepals 35, valvate in the bud. Pod long, 2-carpelled TILIACE.E. 25 



d Sepals 3 5. dd Petals imbricate in bud. Fruits simple ROSACEJE. 44 



dd Petals convolute in bud. Fruit compound LOASACE^E. 55 



e Stamens opposite to the petals and of the same number. Pistil 1 only. .BEBBEBIDACE^E. 6 



e Stamens alternate with the petals or more numerous RANUNCULACEJS. 1 



/ Stamens 6, tetradynamous. Pod 2-celled. Flowers cruciform CBUCIFEB^E. 11 



/ Stamens 432, not tetradynamous. Pod 1-celled CAPPABIDACE.E. 12 



g Sepals 5, unequal. Flowers perfect, numerous, minute CISTACE^J. 15 



g Sepals 5, equal. Flowers mono3cious. Herbs woolly or scurfy OBDEB 113 



